Bandsaw Blades & Bandknife Blades
Prosharp Product Care
Basic Bandsaw advice is available with your machine instructions and this should be used in preference to all other sources of information.
However this is often missing or sometimes a little vague or confusing so here we have our very basic and easy to follow advice for choosing the correct bandsaw blade for your machine. This includes determining bandsaw blade length the width the gauge and the correct TPI for the job.
Easy way to find bandsaw blade length if you have a blade already
1 Make a mark on the inside of the bandsaw blade and on the floor.
2 Line the marks up
3 Roll the blade in a straight line untill the bansdsaw blade mark touches the floor
4 Make another mark on the floor
5 Measure between the marks on the floor, this is the blade length
Easy way to find bandsaw blade length if you have no blade
This involves a bit of basic math a tape measure and a calculator
"Before you start". Set the blade tensioning wheel usually the top one to about halfway or just below, you do this with a handle or knob that moves the wheel this will ensure that the band you order can be tensioned fully. If you don't adjust this wheel it may be in the fully tensioned position and the blade you order may be to big and you will not be able to get the proper tension to make the blade work well.
1 Measure the radius of each wheel this is R1 and R2
2 Measure the distance between the wheel centres this is C
3 Use the following formula to find the blade length required to fit your machine
R1x 3.142 + R2x 3.142 + 2xC = blade length
Use a piece of string
Really basic and is good for small 3 wheel bandsaw machines.
1 Adjust the wheel position as in example 2
2 Run a piece of string around the wheels so that it is tightish
3 Mark with a pen across the overlapping string and measure the distance between the marks
This the length of the blade
Bandsaw - Width - TPI - Gauge
Width of the band determines the radius you can cut or the tightness of the corner you can go around. The narrower the band the tighter the corner and the less accurate in a straight line and the wider the band the straighter the cut and the more accurate in a straight line. For example a 1/16" band can almost go around a 90 degree corner but a 1" band will do a wide sweeping curve.
TPI To work properly and to be efficient the correct number of teeth are required for the work to be cut. A rule of thumb is no more than 10 teeth in the cut but no less than 3 and this depends on the material you are cutting, a lot of good books are available and articles on cutting all materials are on the net. A big subject that warrants more than a basic guide
Gauge This is the thickness of the blade material it is made from. Hobby or 3 wheel bandsaws are normally of thinner gauge than 2 wheel or larger bandsaw machines.
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